This is pre-release Docker stuff. Although agreed in principle at time of
writing, this may never become part of Docker or may be changed in significant ways. Once this is supported by Docker,
you should use their documentation.

I used Stefan Scherer’s WhoAmI image to help
me understand this functionality.

Recently, I have setup a stack of Raspberry Pis into to test out Docker Swarm,
Kubernetes and OpenFAAS. The biggest problem I found with this is
setting up the Pi itself - it’s not difficult as such, just fiddly.

Last month, my wife and I went on a fabulous cruise
for our honeymoon. When meeting new people, eventually you get asked the inevitable question “so Simon, how do you earn
a crust?” With the exception of the Cockney train driver who thought that a software engineer made sofas, pretty much
everyone responded the same way - “I couldn’t do that, I’m not clever enough”.